Unfortunately, I'd like to use any payment system, like ShareIt (which accepts payments from all countries and doesn't need a PayPal account), so using PayPal as the only option isn't going to make my day.

I'll contact Semilogic to see if there's anything worthy, though.

I guess I'll use WordPress for Zen cart module with zen cart for e-commerce websites and use the E-Commerce lite plugin for a small blog webshop, if I don't install Drupal, that is.

The question remains, though. Has anyone used the "Three page optimization technique" for the e-commerce websites on any e-commerce system?